Rust-resisting mild steel and process of producing the same



Patented Apr. 28, 1925.

UNITED STATES N Drawing.

To all whomit may concern.

Be it known that I, SAMUEL Pmcoolga citizen of the United States, residin at \Vheeling, in the county of Ohio and btatei a of Vest Virginia, have invented certain new and useful Improvements in Rust-Resisting Mild Steel and Processes of Producing the Same; and I do hereby declare the following to be a full, clear, and exact description I0 of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. I

This invention 'relates to a rust resisting iron or steel and process of producing the J5 same. and has for its object to improve the procedures and the products of this nature which have been heretofore proposed.

'ith these and other objects in view, the invention consists in the novel steps and combinations of steps constituting the process and in the novel iron or steel product constituting the product, all as will be more fully hereinafter disclosed and particularly pointed out in the claim.

: It is 'well known that the presence of a small percentage of copper in mildsteel, say. from 0.1% to 0.3%. will increase its resistance to corrosion when exposed to acid solutions or solutions carrying ionizable 30 salts. But it is also well known that in alkaline solutions or in water of a high degree of purity. the presence of such small percentage of copper will increase the velocity of the corrosion of said steel.

i In this invention, on the other hand, I

PATENT OFF-ICE.

vmemm, ASSIGNOR TO- WHEELING s'rEEL vmemm, A coaaom'rron or DELAWARE.

RUST-RESIS'I'ING MILD STEEL AND,

PROCESS OF PRODUCING TH] Application filed March 14, 924. semi 110.5903.

have found that when a like small percent age of tin is added to the said copper bearing mild steel, the resultingmetal not only. retains its resistance to the corrosion of acid solutions and solutions of ionizable salts, 4" but it also'possesses an equal measure of re-, sistanceto the corrosion to alkaline solutions and to water of a high degree of purity. That is, if a mild steel in its molten state is treated with not more than\0.3% and not. less than 0.1% of copper, and like quantities of tin, or if said uantities of-copper and tin are otherwise alloyed therewithi the resulting product will possess an increased. resistance to corrosion from solutions of acids, solutions'of ionizable salts, alkalinesolutions and water of a high degree of purity. On the other hand, if the quantities of copper and tin be increased or diminished beyond the limits stated inferior results will be encountered.

I am unable to give a satisfactory scientific explanation of the coaction of the tin and copper. and believe it is due tosome unexplain'ed inter-ionic action between the tin and copper in the presence of the iron which inhibits the oxidation of the iron.

That is claimed is The hereindescribed mild corrosion resistance. the same containing not 05 less than 0.1% and not more than 0.3% of each of the metals copper and tin.

In testimony whereof I atfix' my signature.

SAMUEL PEACOCK steel of a high 

